Radio junction box



Nov. 2 ,192e. I 1,604,973

B. D. COLEN RADIO JUNCTION BOX Filed July 1, 1924 a INVENTOR /6 RNEY Patented Nov. 2, 1926.

UNITE STATES 4 1,604,973 PATENT orricu.

BERNARD D. COLE-N, OF NEW YORK, N. Y.

RADIO JUNCTION BOX.

Application filed July 1, 1524. Serial No. 723,529.

. cuit wires, which may also serve as a housing for a lightning arrester and which is relatively simple, compact and relatively inexpensive. Various other objects and advantages will appear from the following description of an embodiment of the invention,

and the various novel features will be particularly pointed out hereinafter in the appended claims.

In the accompanying drawing, Figure 1 is a perspective of a junction box constructed in accordance with the invention.

Fig; 2 is a plan of the base of the same with the cap removed. 7

F ig. 3 is a plan of the under face of the cap.

Fig. tis a plan of the under face of the base, and

Fig. 5 is a transverse sectional elevation of the box, the section being taken transversely along the line 55 of Fig. 2.

In the illustrated embodiment of the in vention, a base member 1 may be molded from suitable insulating products or materials such as hard rubber or phenolic condensation products. The base is provided with superposed cavities 2 and 3 separated by a partition wall 4 of dielectric composition and opening respectively into the upper and lower faces. The upper cavity 2 may be closed by a plate 5 such as a glass or mica sheet that may be held in position by a split ring 6 overlying the periphery of the closure plate 5 and springing into an undercut groove .in the periphery of the cavity, the

plate fitting against a shoulder in the cavity.

The lower cavity 3 may be closed by a plate 7 which is countersunk into the bottom face of the base member and secured to the base member removably in any suitable manner such as by screws 8.

A plurality of contact sockets 9 are molded .or otherwise inserted into the base member 1 so as to extend from the lower cavity 3 to the upper face of the base member without passing through the upper cavity 2. The upper ends of the socket members terminate some distance below the upper face of the base member and the basemember isprovided with passages extending from the upper face thereof to the socket members, the passages having diameters corresponding in size to the bores of the socket members and aligned therewith so as to form substantial continuations of the bores of the socket members. The socket members at their lower ends are provided with suitable means such as screws 1 servlng as terminals for the attachment of circuit wires 11 running from the antenna,

ground and batteries, there being aseparate circuit member for each circuit wire.

The battery wires may enter thejunction box in theform of a cable 12 passing through. an aperture 13 in a lateral wall of the'base member and the antenna and groundwires 'la and 15 respectively may enter the cavity 3 through special passages 16 and 17 in the lateral wall of the casing. The antenna and ground wires are connected preferably to two diametrically opposite contact sockets and these particular contact sockets to which they are connected have fitted over them plates 18 whlch extend into the upper cavity Suitable electrodes 19 are secured upon these extension plates 18 in any suitable 35 manner, such as by screws 20, the electrodes extending toward one another and having their tips spaced slightly apart so as to form a spark gap or static gap which is commonly called a lightning arrester. charge on the antenna becomes sufiicient to jump the gap between the electrodes, it will pass to ground and not enter and injure the set.

which pass upwardly into the section 22 from 100 the lower face of the body and cap member. The base part of the cap member and the removable section 22 .have co-operating cavities upon their abutting faces so as to form a chamber or cavity 24. A plurality of con- I05 tact pins 25 are passed through or molded into the, base part ofthe cap member so, as to extend from the chamber 24 throughthe cap member and depend therefrom. The contact pins 25 are arranged on the cap member in 110 the same order and spacing as the contact sockets, so that all of the pins will enter cor- Thus if the A cap member 21 of insulating material responding socket members in the base meniber whenever the cap member is brought into a particular position against the base member. The depending ends of the'contact pins are preferably provided with slits 26 ex- The circuit wires from the set/may be included in a cable which enters the chamber or cavity 24 through an aperture 29 in .the cap member,'the circuit wires 30 of the cable 28 being separated within the cavity or chamber 24 and connected individually to the separatecontact pins.

In the use of the device, the antenna,

ground and battery wires from the set are included within the cable 28 and properly connected'to the contact pins in the cap member. The antenna lead 14 and the ground lead 15 are connected to the contact sockets of the base member, which are electrically connected to the electrodes, so that the accumulation of an injurious or exces= sive potential upon the antenna lead will be prevented, since the potential will jump the gap between the electrodes and pass directly to the ground through the ground lead. The battery wires coming directly from the batteries are included in the cable 12 and after entering the. base member the battery I to the various contact sockets so that when the cap member is applied to the base member, the circuit wires coming from the set will be properly connected to corresponding circuit wires running to the batteries and to the antennaand ground.

To disconnect the set so that it canbe removed, it is necessary merely to pull up-' wardly upon the cap member, which will remove all the pins from the sockets and break the electrical connections to the set. It will be noted that during this disconnection the lightning arrester or protector will still be effective in the base member. To re-connect the set it is necessary merely to reapply the cap member to the base member with the contact pins entering the sockets to reestablish electrical connections. In order -to avoid the possibility of getting the wrong such an arrangement, there can be no possibility' of putting the pins in thew-rong sockets. Since the contact sockets terminate some. distance below the upper surface of the" base member before any pins can be inserted far enough into the sockets to establish a connection with the contact sockets. effectively prevents any danger of accidental misconnections by inexperienced operators.

It will be obvious that various changes in the details and arrangement of parts which have-been herein described and illus trated for the purpose of explaining the nature of the invention and one embodiment thereof, may be made by those skilled in the art within the principle and scope of the invention as expressed in the appended claims.

I claim:

1. A radio junction box comprising base and cap members of insulating material, the

This

base member having two superposed cavities divided by an insulating wall, contact sockets disposed in passages of the base member leading from one of said cavities to the upthe sockets whereby when brought together in a determined relation the pins may enter and contact'with the sockets, spark gap electrodes in the other of said cavities and electrically connected to two of said sockets to which the antenna and ground circuit wires are to be-connected, whereby the electrodes will serve as a lightning protector.

2. A radio junction box comprising base and cap members of insulating material, the base member having two separate superposed cavities, one in top and the other in the bottom faces, contact sockets in passages in the base member leading to the upper face from the lowercavity and having in said lower cavity suitable terminals for the 'ment corresponding to the arrangement of sockets whereby when the members are brought together in a determined relation the pins may all enter and contact with the sockets and conductors leading from those sockets to which the antenna and ground wires are to be connected into the upper cavity and mounting electrodes of a spark 3. A radio junction box comprising'base and'cap members of insulating material, the

base member having two separate superposed cavities, one in top and the other in the bottom faces, contact sockets in passages inthe base member leading to the upper face from the lower cavity and having'in said lower cavity. suitable terminals for the'oonnection thereto of circuit wires, contact pins to which other circiiit wires may be connected carried by the cap in an arrangement corresponding to the arrangement of sockets whereby when the members are brought together in a determined relation the pins may all enter. and contact with the sockets, conductors leading from those sockets to which the antenna and ground wires are to be connected into the upper cavity and mounting electrodes of a spark gap, and a removable plate closing the upper cavity to prevent the entrance therein of the contact pins when the pins are improperly presented.

In testimony whereof I-have' hereunto setmy hand.

BERNARD D. COLEN. 

